To many countries, hosting the Olympic Games is a dream come true. In reality, however, it almost inevitably puts the host city in debt, results in wasted infrastructure, and puts a huge burden on local citizens, and this will surely happen in Japan.
Hosting the Olympics requires an immense financial investment. It is notoriously impossible to stay within budget, and as expenditures increase, so will Tokyo's debt. This will make it harder for the government to invest in beneficial things such as education and healthcare going forward. The billions of dollars spent on the Olympics would be better used in ways that improve the lives of citizens in Japan.
Infrastructure is another reason hosting the Olympics will be disadvantageous. Huge amounts are being spent on constructing new facilities such as stadium venues and train stations, many of which will fall into disuse after the Olympics. These will continue to drain taxpayers' pockets as they will require regular maintenance.
Finally, the Olympics will create numerous problems for residents. Security and logistics measures taken to expedite athletes' transportation will result in street closures that hurt local businesses. Throngs of tourists will create huge traffic jams and crowd public transportation, and the loud, celebratory atmosphere will get in the way of citizens' daily routines.
While many people enjoy the Olympic Games, the overall effect they have on the host country is negative. The various economic consequences and inconvenience to local citizens are certainly best avoided.